Consolidated Statements of Shareowners' Deficit (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance		$ (676.7)		$ (698.2)	$ (676.7)	$ (698.2)	$ (715.2)
Net income (loss)	(18.3)	7.0	(28.1)	(36.7)	75.6	(54.7)	11.2
Other comprehensive (loss) income					(40.6)	76.4	(0.8)
Shares issued under employee plans					1.4	2.4	14.5
Shares purchased under employee plans and other					(1.1)	(2.3)	(2.8)
Stock-based compensation					3.3	4.9	5.2
Exercise of warrants				4.4			1.5
Exercise of warrants						5.2	0.1
Repurchase and retirement of shares					0	0	0.1
Repurchase and retirement of shares							0
Dividends on preferred stock					(10.4)	(10.4)	(10.4)
Balance	(648.5)		(676.7)		(648.5)	(676.7)	(698.2)
Preferred Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance								3.1
Balance								129.4
Balance	3.1		3.1		3.1	3.1	3.1	3.1
Balance	129.4		129.4		129.4	129.4	129.4	129.4
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance		208.7		203.0	208.7	203.0	196.3
Balance		2.1		2.0	2.1	2.0	2.0
Shares issued under employee plans					1.1	1.6	5.2
Shares issued under employee plans					0	0	0
Shares purchased under employee plans and other					(0.2)	(0.3)	0
Shares purchased under employee plans and other					0	0	0
Stock-based compensation					0	0	0
Stock-based compensation					0	0	0
Exercise of warrants						4.4	1.5
Exercise of warrants						0.1	0
Repurchase and retirement of shares							0
Repurchase and retirement of shares							0
Balance	209.6		208.7		209.6	208.7	203.0
Balance	2.1		2.1		2.1	2.1	2.0
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance		2,590.6		2,590.9	2,590.6	2,590.9	2,584.6
Shares issued under employee plans					1.4	2.4	14.5
Shares purchased under employee plans and other					(2.0)	(2.3)	(2.8)
Stock-based compensation					3.3	4.9	5.2
Exercise of warrants						5.1	0.1
Repurchase and retirement of shares							(0.3)
Dividends on preferred stock					(10.4)	(10.4)	(10.4)
Balance	2,582.9		2,590.6		2,582.9	2,590.6	2,590.9
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance		(3,263.5)		(3,208.8)	(3,263.5)	(3,208.8)	(3,220.0)
Net income (loss)					75.6	(54.7)	11.2
Balance	(3,187.9)		(3,263.5)		(3,187.9)	(3,263.5)	(3,208.8)
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance		(133.3)		(209.7)	(133.3)	(209.7)	(208.9)
Other comprehensive (loss) income					(40.6)	76.4	(0.8)
Balance	(173.9)		(133.3)		(173.9)	(133.3)	(209.7)
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance		(0.5)		(0.5)	(0.5)	(0.5)	(0.6)
Balance		(2.0)		(2.0)	(2.0)	(2.0)	(2.3)
Shares issued under employee plans					0	0	0
Shares issued under employee plans					0	0	0
Shares purchased under employee plans and other					0.2	0	0
Shares purchased under employee plans and other					0.9	0	0
Stock-based compensation					0	0	0
Stock-based compensation					0	0	0
Repurchase and retirement of shares							0.1
Repurchase and retirement of shares							0.3
Balance	(0.3)		(0.5)		(0.3)	(0.5)	(0.5)
Balance	$ (1.1)		$ (2.0)		$ (1.1)	$ (2.0)	$ (2.0)